Chain-welding machine



May 22, 1923. Y

"r. c; Luce:

CHAIN WELDING MAUI- INF}v Filedwiune 1a, 1919 '7'Sheets- Sfieet2 M ay 22, 1923. 1,456,026

T. C. LUCE .CHAIN WELDING MACHINE Filed June 18, 1919' 7 Sheets-Sheet 5 Y; i Pip H1 E we M L 56 Fig} u 55 7 \pa gum/14 601;

May 22, 1923. I 1,456,026

v T; C. LUCE CHAIN WELDING MACHINE Filed June 18, 1919 '7 Sheets-Sheet s 1,456,026 T. C. LUCE CHAIN WELDING MACHINE Y Filed June 18, 1919- SheigtLs-Sfiee'tfi I May 22, 1923. A

T. c. LUCE CHAIN WELDING MACHINE Filed June 18 1919 '7 Sheets-Sheet 7 Patented May 223, lgfi tie-tare THOMAS C. LUCIE, OE STBATFORD, CONNECTICUT.

OHAIN -WELDING' INCACHINE.

Application filed June 18, 1919. Serial No. 305,170.

T 0 all whom it may conccvw: I

Be it known that 1, Thomas {A Loon, a citizen ot the United States. residing in the town of Strait-ford, county of Fairtield, and

State of Connecticut, have invented certain new and useful improyements in Chainllelding lllachines. of which the following is a "full, clear. and exact description.

This invention relates to a welding or forging machine provided with power operated swinging hammers and more particularly to machine for weldin split links in the niai'iut'acture of a chain.

Heretoifore a large number t welded chains in general use have been manutactured by heating; the split links of which the chain is to be COllStlllCLQCl in a furnace, after which each link is inserted through the last link of the chain and the overlapping portions of the split link are welded together upon an anvil by pounding upon the link with one or more sledge hammers. This method of closing the links consumes considerable time, requires heavy manual labor and considerable skill on the part of the workmen wielding the hammers. Furthermore ii the links usually necessary to reheat each link one or more times bet-ore the weld is completed, thus materially increasing the time con sinned in. closing up each link.

One important object of my invention therefore is to provide a machine with power operated hammers constructed to quickly and satisfactorily weld the overlapping parts of a link together before he same has cooled sufiiciently to make reheating: necessary, to thereby entirely eliminate the use. of a manually operated hammer in constrnctinfr a chain of welded links.

A more specific object of my inrention is to provide a link welding; machine with at least two hann'i'iers. one hammer being; pro vided to perform the major portion of the link closing operation. and a second hammer constructed to smooth down the tip ends oi the overlapping portions of the link, to cause them to properly engage the adjacent body portion of the link. The construction and operation of this second hammer is important since the most dil'licult part of welding link is to get these tip ends are relatively it isproperly welded, and if this is not done the strength oi the link is materially reduced.

Another important object of my invention is to provide mechanical means for quickly turning; the link over upon its anvil in order that either side of the link may be exposed'to the blows of the hammers.

Still another obj ct of my invention is to improve the construction and operation of the type of machine to which my invention relates, and to operate the power driven hammers in such a manner that the jolting and jarringproduced by th se rapidly moving hammers will be reduced to a minimum.

To these and other ends, the invention consists in the novel :teat'ures'and combinations oi parts to he hereinafter described.

In the accompanying drawings;

Fig. l is a front elevation oi my complete welding machine.

Fig. 2 is a side elevation of the same in which the auxiliary hammer is not shown and the main hammer is shown in full lines in its raised position and in dotted lines in its striking position.

Fig. 2 is a detail view looking in the direction of the arrow 2 Fig. 2.

Fig. 3 is a top plan view of Fig. 1.

Fig". l is an enlarged sectional view taken on the line t-4 of Fig. 2 looking in the direction of the arrows.

Fig. 5 is a sectional view taken on the line 55 of Fig. 2 looking in the direction of the arrows.

(5 is an enlarged fragmentary view of Fig. 8 looking in the direction of the arrow 6, and. showingthe auxiliary hammer in "full lines in its striking position, and dotted lines in its raised position. 7 is a sectioi'ial view taken suhsta'in on the line 7-7 of Fig. 3, part of the wing; broken away.

7 is a sectional View taken suhstanon the line 'Z' 'T of Fig. T. S is a sectional View taken on the line S-'8 of Fig. 3 looking in the direction of the arrows.

9 is an enlarged front view oi the anvih the face plate being removed to disclose my link turning; mechanisnn and these parts are shown in their inoperative posi tion.

Fig. is a view similar to Fig. 9, showing the positlon of the link turning mechanism 1 I when the link is partly turned.

Fig. 14 is a plan and e d viewi respectively of a split link.

In the embodiment of my invention illus trated in the drawings, I have designated by the numeral 15 an anvil supporting frame, which preferably consists of arelat-ively heavy box-like casting which may be secured to the floor by bolts 16. Upon the upper face of this frame is mounted-the anvil 17. Upon the front face of the frame 15 is preferably secured ashelf 18, the same being secured in place by bolts 18.

of the groove.

The upper face of the anvil 17 preferably has a dove-tailed groove formed longitudinally thereof, which is adapted to receive a correspondingly formed tongue 19, formed upon the lower face of the anvil die 20. The cooperating tongue and groove, just mentioned form aconvenient means for rigidly securing the die 20 to the anvil 17, a tapered key 21 preferably being provided, which is wedged in between the tongue and one side I Upon theuppcr face of the die 20 is preferably formed an upwardly projecting boss 22, which serves to properly position the link 23 upon the die and give a perfect form to the inside radius of the welded portion.

The anvil supporting frame 15 is preferably provided with two independently operated hammers. One of these hammers,

I which I prefer to term a main hammer and which I have designated by the numeral 24,

is preferably pivotally mounted directly be hind the anvil to swing in a vertical plane extending at right angles to the anvil, while the other hammer, which 1 term the time iliary hammer and designated by the numeral. 25, preferably swings in a plane forming an angle at substantially 45 to the plane of the first mentioned. hammer. Upon the upper faceof the frame 15 and adjacent the rear edge of the same is preferably formed a pairof spaced upwardly projecting lugs 29 are threaded. The inner ends of these bolts are pointed, as indicated by 30, and are, received in correspondingly shaped sockets formed in the opposite sides of the hammer 24, these bolts being preferably locked in their proper adjustment by lock nuts 31. In order to provide means for normally supporting the hammer in its raised position, as shown in Fig. 2,.and for also counterweighting this hammer, which is of necessity fairly heavy, I have provided the coiled spring 32,

aportijon of which extends across the front face of the hammer 24, and is then coiled around the oppositely projecting bosses 33 formed upon the hammer, and the ends 34 of this spring engage the forward edge of the bosses 26 and 27, the arrangement of this spring being such that it will be placed under tension as the hammer is swung down towards its anvil, but Wlll be 37 by means of which the hammer .is operated in a manner hereinafter pointed out. The anvil supporting frame 15 is provided with relieved from tension as the hammer assumes a second pair of upwardly projecting lugs 38 and 39,'the lug 38 being positioned adj acent the lug 27, whereas the lug 39 projects outwardly from the left hand side of the frame 15 and is preferably bolted to the V anvil 17 by bolts 40. The auxiliary hammer 25 is pivotally mounted between the lugs 88 and 39 by bolts 41 and 42, similar to the bolts 28 and 29, and this hammer'is pro vided with a coiled spring 43, which oper ates to normally support its hammer in a the spring 32, and this hammer 25 is also provided with a rearwardly projecting arm 44, by means of which the same may be operated. The forward end of the auxiliary hammer 25 is provided with a hammer die 45, the construction and operation of which will be hereinafter described.

The power operated means for operating the swinging hammers 24 and. 25 will now be described. To the rear of the anvil supporting frame 15 is mounted the frame which I have designated in itsentirety by raised position similar to the operation of.

the numeral 46. This frame is preferably separate from the frame 15, and is secured to the floor by any preferred. means. The

frame 46 consists preferably of the uprigl'it end members 47, 48 and the horizontally extending beams 49 and 50, the opposite'ends of which are bolted to the upper ends of the uprights 47 and '48 by bolts 51. Upon the floor, but-within theframe 46, are mounted the brackets 52, positioned adjacent the inner faces of the uprights 47 and 48, and in these brackets are mounted the opposite ends of the shaft 53, the shaft being'non rotatably secured to the brackets by pins or the like 54. Upon the shaft 53 are mounted three relatively similar U-shaped rocking levers 55, 56 ano 57. These levers are mount ed to rock about the shaft 53 as an axis, and the middle U-shaped lever 56 is driven by the power means, hereinafter described, while the right and left hand levers and 57 may be operatively connected to the lever 56, and in turn are operatively connected to the ham mers- 2 2 and 25 respectively. The means which I have provided for imparting a rock ing movement to the lever 56 consists preterably of the following mechanism. Between the spaced beams 49 and 50 is rotata-bly mounted a shaft 58, upon which are mounted the belt pulleys 59 and 60, the pulley 59 being loosely mounted upon its shaft -while the pulley 60 is rigidly secured to its shaft by a key 61, and either of these pulleys may be driven by the belt 62, which may be shifted from one pulley to the other in a well-known manner, the belt 62 being driven by any preferred source of power. Upon the forward end or" the shaft 58 is rigidly secured the crank arm 63, which arm is operatively connected to therocking lever 56 by the connecting rod 64, a universal joint 65 being provided at the upper end of the con necting rod 64. and a similar universal joint 66 being provided at the lower end of this shaft. From the driving means, just described, it will be seen that when the belt runs over the loose pulley 59, the rocking lever 56 will not be operated, but it this belt is shifted over to run upon the fixed pulley 60, a rocking movement will be imparted to the rocking lever 56. y

It will be apparent that means must be provided for operating either of the hammers 24 and 25, and that this means must be constructed so that either hammer may be conveniently brought into and out of operation, as the operator welding the link 23 may desire, but at the same time means must be provided for preventing both hammers from delivering a blow at the same time. The means by which either hammer may be brought into operation, and the means by which the operator may control these hammers will now be described. The operating lever 55 is operatively connected to the main .iammer 24 by means of a connecting rod 67, the lower end of thisrod being preferably provided with an eye 68. through which a pin 69 passes, the ends or this pin being mounted in the opposite legs of the U-shaped lever 55. The upper end of the connecting rod 67 is connected to the arm by means of a rocking block 70, which btocl: is mouno ed in a slot formed in the rear end of the arm 37, and is pivotally mounted therein by the oppositely projecting trunnions 71. This'block 70 is provided with a drill-hole extendingtherethrough to slldably receive the connecting rod 67 and in order that the connecting rod may be yieldingly connected to the hammer which it operates, springs '72 and 73 are positioned about this rod below and above the block 70. One end of the spring 7 2 rests on a collar-7 L, while its opposite end abuts against the block 76 and one end of the spring 73 engages the block 70 while the opposite end engages theadjust able nuts 75. The rocking lever 57 is operatively connected to the auxiliary hammer 25 by a connecting rod 7 6. which is r'ath l similar in construction and operation to the rod 64 just described. The upper end of the rod 7 6 is provided with a spring 77, one end of which abuts against the upper face of the rocking block 78, while the opposite end abuts against the adjustable nuts 79, and a collar secured to the rod 7 6 operativ'ely engages the lower face of the block 7 The lower end of the rod 76 passes through a drill-hole formed in an extension 80 with which the rocking lever 57 is provided, a .pring 81 being provided between the uppertace of the extension 80 and a collar 82, and the lower face of the extension 86 is engaged by one of a pair of lock nuts 83 mounted upon the lower end of this rod. The resilient connection between the rocking levers and their hammers is very desirable, because the entire welding machine is in this manner relieved to a large extent from the severe jolt ing and jarring to which it would be submitted if no play should be permitted between the hammers which are required to deliver hard and fast blows to the work upon the anvil and the rotating pulley wheel which supplies the power to these hammers.

The means which I have provided for operatively connecting either the rocking lever 55 or the rocking lever 57 to the power operated lever 56 will now be described. @ne of the arms of the U-shaped rocking lever 56 has a drill-hole 84- r"ormed therethrough and the opposite arm has similar drillhole 85 formed therethrough. The arms of the U-shaped lever 55 are preferably retained in their spaced relations by a block 86 which may be riveted between the same, and in front of this block is mounted a sliding bolt 87, the opposite ends of which are slidably mounted in drill-holes torn'ied through the arms 01 this Ll-shaped lever and the inner end of this bolt 87 is positioned to be moved into and out oi the drilh hole 84, a spring 88 being provided to force the bolt 87 into the drill-hole 84 The bolt 87 has a substantially rectangular block 5 rigidly secured to an intermediate portion thereof and one end of the spring 88 abuts against this block, while the opposite end abuts against an arm of the ll-shaped me ber 55. The rear face of the block sli ably engages the forward face of the blocl. S6 to thereby prevent the block 89, and the bolt to whichit is secured from rotating.

The rockinglever 57 is provided with a slidingbolt 90, which operates in exactly the samemanncr as the slidingbolt 87, just descr1bed,"Th'is bolt 901s plOYKlGCl'XVllZll a rectangular block 91 against which one end that whenever they arefrele'ased" these bolts will be forced mto'operative engagement with the sockets formedfin the lever 56 soon as the socket is brought into alignment with these bolts. In order to provide means controlled by the operator for retainingthe .bolts '87 and '90 in their retracte d position and thereby prevent the hammers from being driven,1 have provided the relatively long rocking shaft one end of which is rotatably mounted. in" a bearing block 94 and to 'the'oppo'site end of this shaft is rigidly connected a root controlled treadle 95, whichtreadle is norinally held in its raised position by means hereinafterdescribed. Upon the inner end of the shaft 93 is rigidly secured arocking plate 96, the upper en-d of which tapered,

as at 97, to cooperate with a correspondingly tapered surface 98, formed upon thebloclt 91, the arrangement being such that when the foot of the operator is removed from the treadle 95, it moves upwardly to its'norm'al position, thereby rockingthe shaft 93, which in turn moves the plate 96, so that its upper end will lie in a position to be engagedby the block 9.1,as the lever 57 is rocked dow'nwardly andas this occurs, the inclined surfaces 97 and 9S cooperate to retract the bolt 90, since the upper end or the platewill in this manner be inserted between one face of the lever 57 and vthe block 91, as shown in Fig. 5. As soon as this occurs, the lever 57 is "no-longer connected to the operating lever 56 and the, lever 57 willremain in its depressed position until the treadle 95 is again depressed to swingthe plate 96 out of engagement with the block 91 to permit the bolt to be moved into locking engagement with the lever-56. In order to control the driving connection between the levers and 56, a second foot treadle 99 is provided, which is rigidly secured to a relatively long sleeve 100 loosely mounted upon theshatt 93, and upon the inner end of this sleeve is mounted a plate 101, the upper end of which cooperates with the block 89 to retract the bolt 87 in the manner justdescribed. 1* rom the construction 111st de,-.

, scribed, it will be seen'that assuming the driving belt is running on the fixed pulley 60, the main hammer 24 will be operated as long as the treadle 99 is held in its de pressed position, and the auxiliary hammer 25 will be operated as long as the treadle 95 is held in its depressed position. In order to prevent the treadles 95 and 99 from being depressed simultaneously, andpthereby pre vent both hammers from being operated simultaneously, I have provided the swinging stop 102 (see particularly Figs. 1 and 8), this stop is pivotally mounted upona supporting bracket 103 positioned between the' adjacent treadles 95 and 99, thearrangement being such that when one treadle is' depressed, for example, :thetreadle 99,

as shown in full lines in Fig. 8, the stop 102 will be swung to thepositionshown in scribed, it will be apparent that means must be provided for enabling him to vary ,the

force-of the blows delivered by the hammers,

and in order that this may be accomplished,

I have provided the means'whi ch I will now describe; The drivingbeItGQ isnormally rather loose so thatconsiderable slippage between this belt "and the fastpulley 60is permitted, so that when the operating lever 56 is operatively connectedto either'the'rock ing lever 55 or 57, the han menoperated thereby'w'ill strike the work uponthe anvil a relatively light blow,and in order to increase the force of the blow delivered by these hammers, it is necessary to tighten the belt 62.. For this purpose I'have provided a belt tightener controlled by, thei'q erator.

The belt tightener illustratedconsistsof a rocking frame 10st, which is'pivotallymount ed upon a supporting shaft 105. This frame 1's provided with a pair of upwardlydirected arms, between which a belt tightening roller 106 is rotatably mounted, and the lower portion of this frame is p'rovided with a pair of outwardly projecting arms, one ofwhich' has an operating rod 107 connected thereto, and upon the lower end of this rod is formed a cross-head 108, which cross-head is positioned to be engaged bythe rearwardly projecting ends of the treadles 95' and 99, the arrangement being such that when either of these treadles is depressed, the rod107 will be raised, which in turn moves the belt tight-' ening roller into engagement with the driv- -ing belt,so that this belt may be tightened as much as desired by increasing the"pressure upon the outer end of either of the treadles 95 and 99. 'A bracket 109, which is secured 'to' the floor, is provided to slidably retain the lower end of the rod 107 in its proper position relatively to the operating levers 95 and 99, and a spring 110 is provided to normally hold the roller 106 out of operative engagement with the belt 62, this spring serves also tosupp'ort the forward end of the levers 95 and 99 in their raised position by exerting pressure on the rear ends of these levers:

'ri 'ht an 'les to the direction In welding the overlapping parts of a split link together, for example, such as shown in 1 i 1 1, considerable care and skill is required to get the tip end of the overlapping parts properly welded to the body portion of the link, and if this is not done, the strength of the link will be materially reduced and a defective link will be produced. In order to properly weld these tip ends to the portion of the link which they overlap, 1 have provided the type of hannner die 15 mounted upon the auxiliary hammer 25, which I shall now describe in detail. The head of the hammer has a socket 111 formed therein, i-- which is pivotally mount ed the hammer die 15 by means of a pivot pin 112. The die is permitted a limited amount of rocking movement within the hammer head and is normally retained in the position shown in Fig. 7 by-a spring 113 mounted in a drill-hole formed in the head of the hammer and retained therein by an adj ustable belt 1 1, the lower end of this spring being positioned upon the upper face of the rockin die 45. The downward rocking nmve 4 inont of this die is limited by lug- 1'15 projecting outwardly therefrom and positioned to abut against a shonlizer 11o formed up on the hammer, the arrangement being such that when this auxiliary hammer strikes the work upon the anvil, the die :5 will be rocked s ightly about its pivot pin 112, there sliding the face of the die 415 overthe work at the instant it strikes the same. This movement tends to knead or smooth the tip end of the link down into proper engagement with the body portion of the link. This particular operation of the die 15, by means. of which the metal is worked in a direction at of impact, causes these tip ends to unite with the body portion of the link in a very satisfactory manner. in order that the striking face of the die 15 will properly conform to the curvature of the link, this face is preferably given a eoncaved curvature in cross section, shown in Fig. '7, while at the same time it is given convened curvature in a lon itudinal direction. as shown in Fig.

1n welding a link, it is necessary to turn the same over from time to time, so that first one side of the link and then the other w'll be exposed to the hammer, and in order that this link may be quickly and accurately turned over so that as little time as possible may be lost in turning the same, 1 have provided the link turning mechanism shown in Figs. 9 to 13 inclusive. This mechanism is mounted upon the front face of the anvil 17, and is preferably housed between front face of the anvil and a plate 17 secured thereto by means of bolts 117. Upon the front face of the anvil is mounted a rocking gear 118 mounted to rock back and forth upon the stud shaft 11.9. This gear is provided with the oppositely extending fingers 120 and 121. The teeth of the gear 118 cooperate with a pinion 122, which is rotatably mounted upon the stud shaft 123, this pinion being provided with a lug or projection 12 1 having a pin 125 projecting laterally therefrom. The pin 125 has a rela-. tively long plate 126 pivotally secured thereto and operated thereby. The upper end of this plate is notched to conform to the curvature of the link and engages the same to assist in turning this link, and the lower portion of this plate has a relatively long slot 127 formed therein in which the stud 119 is slidably received. Upon the opposite sides of the gears 118 and 122 are mounted the slides 12S and 129, which are similar in construction and operation. The upper end of these slides are cut away, as shown, to conform to the curvature of the link they assist in turning and the lower end of these slides are notched, as at 130, these notches 130 being adapted to be engaged by the tip end of the lingers 120 and 121 in the manner hereinafter pointed out. The slides 128 and 129 are further provided with the pins 131 extending through the same and projecting from the opposite faces thereof, which pins are adapted to cooperate with the upper inclined face of the triangular blocks 132. These slides are not fastened to any mechanism within my link turning device, but operate in the relatively narrow slot between the front face of the anvil and the cover plate 17 secured to the same. lhese slides,

when released, move downwardly by the force of gravity to the inoperative position occupied by the slide 129 in F 11, the pins 131 cooperating with the inclined face of the plate 132 to move the upper end of these slides towards the operating gears.

The gear 118 does not turn through a com ,plete circle, but is rocked back and forth by the rocking lever 133, one end of which is pivotally secured to a second lever 1341 having its upper end pivotally secured to the lugs by a pivot pin 136, and this.

lever 13 1 is normally retained in its vertical position by a coiled Spring 13-7, one end of which is connected to the lower end of this lever, and the other to fixed lug 138. The rocking lever 133 is operated by means of the foot treame 139, which treadle preferably rocks about the same axis, as levers 95 and 99, above described, and the right hand end of the lever 133 is operatively connected to the treadle 139 by a connecting rod 1 10. in order that the gear 118 will be rocked in one direction when the operating lever 133 is depressed, and will be rocked inthe opposite direction. the next time this lever is de pressed, 1 have provided the 118 with pins 141 projecting from a lateral face thereof. These pins are positioned to cooperate with notched blocks 1 1-2 rigidly seto the lateral face, of the lever 133,

andthese blocks so positioned'upon their i lever that each t me the lever s raised, the

notch; ofione of theseblocks will be brought into; operative engagement with the pin .1451 which isat that instant named; as clearly shown in Fig. 9. It should be notedthat the 'di'st ancebetween'the blocks' -1 l2 isless than "the distance between the-pins 1 11. 'llhis is necessary inorder that when "one 'pin' is engaged by its cooperatingblock, the other pin wu cien the second block when the lever i sjdepre'ss'edg and in order that this I may occur, the operating lever 133 IS mounted so thatlit may moye' bodily in a longitudinal direction sufficiently to bring either 7 one block 1412 orfthe other into operative 'engagen'ient with one of the pins'lll'. This longitudinal movement is permitted by the rocking leyer 134 and spring" 137. The position of the blocks 141-2 upon the operating; lever 183 is suchthat when this lever is raised towarfds the upper limit of its stroke,

01 1 edge of one of the blocks 1 12 will abut against one of the pihslt'l', as shown in Fig.

above the pin sulii'ciently to permit the lever to 'be mov'edbythe spring 137 to the notch o'f the block directly over the 'pin, whereupon when the 'ley'eris again depressed,

the mwin be ri ikedi'na direction oppofsitegto that in which 1t rocked upon the m- -'med'iatepreceding depression ot' the 'lever When the 'op'erat-ing leyer has been mwe atm upperlim'it' oi its'stroke; one

ofthe blocks 14-2 will be brought into ope'rative'fengagement' with'one oilthe pinsilll 'in the manner just pointed out. while at the *s'a'mi i unease o'f the iingers 120, 121; will engage the'notch 130 formed at the lower end ofjone' of the slides 12S b12129, whereupon w'hen'the'treadle' 133 is depressed, the slidegthe lower end of which is at that ins'ta'ntflen'gaged 'by one of, the fingers is brought into engagement with one side o'i' f the link to be tur'nedl and as the'rocking moi iement oi the gear 118'is continued, this "sjlide*will be? elevated to the succesive positions'shown 1n F1gs.9,"1O.and 11 while at the same time the plate 126 willhave been brought into operative engagement with the oppositefside of thelink and will have raised the same sufficientlyto clear the boss 24. lfvhen'the turning operation of the link'has advanced to the position "shown in Fig. 11,

plet'e" this turning "movement by ggiying a "slight twist to the link with the tongs by {which he holds :the link" throughout the When therock ing of the gear 118 is continued in an anticlockwise direction slightly beyond the posientire welding operation.

tion shown in Fig. 11 the notch 130 at the lower end of the slide .128 will be released this has occurred, the opposite finger 12-1 13., and as "the upward. movement "of this lever 15 continued, this'block Wlll' be movedfrom the finger 120, whereupon it will drop,

due to the force of gravity to 'the dotted position indicated in this figure, while at the same time, the further rotation of the gear 118,will have c aused the; plate 126 to be moved by its pinion'to an inoperative position below the upper face of the'die and to the right hand sideof the stud 123. When will then lie below the notch 180*formed at the lower end of the slide 129, ,anclit the treadle 139 is then released, it will bere turned to its normal raised position by the coiled spring 1418 without moving'the gear V 118, whereupon all the elements otthe' link turning mechanism willbe 'ina position to turn the link-1n the opposite direction as soon as the treadle 1391s again depressed. 1

Theoperation of my. device is as iollowsz' '6 and 7. The operator then steps on either the treadle95 or99 to bring eitherthe main or auxiliary hammer into operation, as

either hammer maybe lused'first, but it is usually preferableto use the main hammer to-olo'se the link and the, auxiliary hammer later to complete the'welding ofthe tipends of the .overlapping portion of the link.

-W'hile eitherhainmer isbeino; used; the force otothe blowstlelivered by the same may be the; belt tightening roller 106' into operative engagement with the belt 62. After a few yaried by increasing the pressure upon the .operatingtreadle controlling the same, since both the treadles ,95 and 99 operate tojswing blows .have. been. delivered by either hammer to one'side of the link, the link isthlen turned over to receive ,blows upon the oppositeside of the same, andthis isdone by stepping on f the lererI139., The depression otthe toot treadle139 operates the'rocking gear 118,

-which in turn, raises either one or the other 'the workman 'oroperator may easily com-' or the link engaging slides 128, 129 to bring one or" thesehslide's into operative engage.

ment with one. side of .the'link tobe turned, whileiat the same time the upper end ofthe plate 126 i'szbroughtintooperat-ive engagement with the'opposite side of the link,

whereupon: the link is. raisedsufliciently to clear the boss 22, andis turned almost com- I pletely over, theturning of the link being completed by the operator who, gifv esa slight finaltwist to the same through his tongs-tothereby bring the opposite side Io f thelilnk -1nt0 engagement with the positioning boss 22. i In this ma nner, the welding of Very large links may be completed so quickly that it will be unnecessary to reheat the same in order to complete the weld, it being understood that the machine herein disclosed is ada ated to deliver blows very much harder and l'aster than can possibly be delivered by an operator or blacksmith swinging a sledge hammer.

Although the various features of my invention are disclosed and described in connection with a link welding machine, will be apparent that they are not necessarily limited in their use to this type of machine, but may readily be applied to various types of welding or forging machines.

In the drawings I have disclosed the levers 95 and 99 as adapted to be controlled by the foot, but it will be apparent that these levers may readily be controlled by hand if desired. I have, therefore, designated these levers in some of the claims as manually controlled.

l hat I claim is:

1. In a chain welding machine, an anvil, two vertically swinging hammers-mounted to deliver blows upon the same face of work on said anvil, and means to selectively operate either ol said hammers.

2. In a chain welding machine, an anvil,

anvil, means to selectively operate either of said hammers, and means to prevent the simultaneous operationof said hammers.

3. In a welding machine, an anvil, a pair of independently operated swinging hammers mounted to impartblows' upon the surface of the work upon said anvil, and power driven means for operating either or said hammers.

4. In a welding machine, an anvil, a vertically swinging hammer mounted to impart blows to work upon said anvil, a hammer die carried by said hammer, said die constructed to simultaneously strike and slide over the work upon the anvil, and power driven rneans for operating said hammer.

In combii'iation with an anvil, a swing- .ing hammer p sitioned to impart blows to work upon said anvil, a movable die carried by said hammer whereby the work is slidingly struck by said die, and power driven means for operating said hammer.

6. In combination with anvil, a hammer mounted to impart blows to work upon said anvil, a. movable die carried by said hammer whereby the blows or" said hammer are converted into a sliding impact, and means for operating said hammer.

7. In combination with an anvil, a swing ino hammer, means for operating said hair mer, and a diepivotally mounted upon said hammer whereby work upon said anvil receives a sliding;- impact thereon from the blow of said swin 'ing hammer.

'ated rocking lever, a swingim 8. A chain welding machine comprising, an anvil, two verticallv s\vin" ng hammers, a source or power, said han'nn-ers mounted to deliver blows upon the upper face of said an\*il at substantially the same point and means to selectively connect either of said hammers tosaid source or power, said means also operating to vary the degree of power supplied.

9. In a welding macl ine, anvil, a swinging hammer mounted to impart blows to worlr upon said anvil, power driven mechanism for operating sai hammer, means for enga ing and disengaging said hammer from said power means,manually controlled "means ii'or varying the force of blows delivered by said hammer, and a single lever for con -olling both o1 said means.

10. In a .welding machine, an anvil, a pair of hammers, a power driven rocking lever, and manually controlled means to selectively connect either of said hammers to said rocking lever.

11. In a welding machine, a pair of vertically swinging hammers and means to selectively operate either of said hammers independently, said hammers mounted to deliver blows at substantially the same point upon the same surface of the work.

12. In a welding machine, an anvil, a swinging, hannner mounted cooperate with said anvil, a power operated lever, means for operatively connecting said swinging hammer to said lever, and manually controlled means for engaging and disengaging the connection between said hammer and lever.

13. In a welding machine.

a power operhammer, means for: operauively connecting said hammer to said lever, and manually controlled means for either comiecting said first mentioned means to said rocking; lever or for releasing the same therefrom.

i i. In a welding machine, av power operated rocking lever. a swinging hammer, means for operatively conne *tinn said hammer to said lever, a sliding bolt for operatively securing said means to said lever ant. for releasing the same therefrom, and manually controlled means for operating said bolt. I

15. In a welding machine, an anvil, a swinging hammer mounted to cooperate therewith, a power operated rocking; lever, means for operatively connecting said hammer to said lever, and a pedal controlled means for engaging and releasing said means from said rocking lever.

venting said hammers trom delivering their blows SllIllllilIlGOUShK.

'17. In a weldin machine an anvil a swinging hammer cooperating therewith,

power operated means for operating said hannnen'and a spring operated lever movable in one direction to connect said hammer to said'power means and movablein the opposite direction to disengage said hammer vfrom said power means.

l8.-In a welding machine, an. anvil, a

swinging hammer cooperating therewith,

power operated means for operating said hammer, a spring operated lever movable in one direction to connect said hammer to said power means an movable in the opposite direction to disengage said hammer from said power means, and second means controlled by said spring operated lever for varying thel orce or the blows delivered by said hammer.

1-9. In combination with a pair of swinging levers, a stop swingingly mounted between said levers and constructed to be moved by the operation of one lever into the pathof movement of the other leverto thereby preventthe operation oi both levers simultaneously.

'ing a link over upon said anvil to thereby expose either face of the link to said hammers, said means being located closely ad jaceut said anvil. and immovable therefrom.

23/In machine for making chain orthe like, a power operated hammer, an anvil, means to turn the work over upon said anvil, and a vertically swinging lever to operate said means.

24. In a machine of the class described,

a power operated hammer, an anvil, means adapted to engage and turn over the work upon saidanvil, a swinging lever to operate said turning means and a manually operable member connected to said swinging lever. v v

25. In a link welding machine, an anvil, a hammer cooperating therewith, and foot operated means for'turning ali'nk upon said anvil alternatively in firstv one direction and then the other without withdrawing said link from over said anvil.

26. In a link welding machine, an anvil, a hammer cooperating therewith, and treadl'e welding operatedmeans for turning a link uponsa-id 'anvil alternatively in one direction or the other without altering the relative long-1- tudinal position of said link in respect to said anvil. y

27. In a link machine, a rocking gear, a reciprocating cooperating with said gear to rock saidgear in a different direction upon each successive depression of said lever, a'link support, and means actuated from said rocking gear to turn a link on said. support.

28; In a link machine, a rock-i11 ear,

r: '7 Y1 reciprocating lever, means upon said, lever cooperating with said gear to reverse the directionof movementof said gear each time said lever is depressed, a linksupp'ort, and

means actuated by said rocking, gear to turn a link on said support without with drawing said link from' said anvil.

29. In a linkmachine, arocking gear, a rocking lever, means for rocking said lever in first one direction and then the other, a

pair of symmetrically arrangedlink en-.

gaging slides, and means carried by said rocking gear tooperate one of saidslides when said gear is moved in one direction and tooperate the other slide when'said gear is moved in the opposite direction to turn a link over a link support.

30;In combination with a die provided with a link'positioning boss, link turning means including a rocking "gear, a blade operated thereby for lifting one side of said link out of engagement with said boss, and

'a-slide constructed to engage the opposite sideofsaidlink and operated by said gear to impart a turning movement'to said link. 31. In a link turning device, a rocking gear, means for rocking said gearin first one direction and then the other, a pair of link engaging slides positioned upon the opposite sides of said gear, and means upon said gear for operating but oneslide when rocked in one direction and for operating theother slide when rocked in the opposite direction. I I

32. In a link turning device, a rocking .gear, means for rocking said gear in first one direction and then the other, a pair of link engaging slides positioned upon the,

opposite sides of said gear and operated thereby, a blade constructed to engage the link to be turned, and means operated by said gear for movingsaid blade in the opposite directionto that in which said gear is rocked. v

33. In alink turningdevice, arecipro eating lever, a rocking gear, means for operating said gear by said lever to rock said gear in a difi erent direction upon each successive depression of said lever, and link engaging slides operated by said rocking lever.

34. In a link machine, a reciprocating lever, means upon said lever llU lever, a rocking gear, and means for operating said gear by said lever to rock said gear in a dilferent direction upon each successive depression of said lever, comprising projections upon said gear, projection engaging elements upon said lever, and means for moving said lever bodily 'tobring the engaging elements carried thereby into operative engagement with said projections, a link support, and means actuated by said rocking gear to turn a link on said support.

Ina link machine, a reciprocating lever, a rocking gear, and means for-operating said gear by said lever to rock said gear in a different direction upon each successive depression of said lever,comprising cooperating elements carried by saidgear and lever "respectively, said elements constructed and arranged to operate said-gear only upon the depression of said lever, whereby said lever maybe raised without operating said' gear, a link support, and means operated by said rocking gear to turn a link on said support. Y i

36. In a device such as described, a movable metal working member, and means for operating the same comprising a pair of separate rocking levers, means for operating one of said levers, a sliding bolt for operatively securing the other lever to said operated lever, manually operable means movable into position to be engaged by said bolt as the lever carrying said bolt ap proaches the end of its rocking stroke, to thereby retract said bolt to its inoperative position, and means for connecting said operated lever with said metal working member.

37. In a device such as described, a movable metal working member, and means for operating the same comprising a pair of independently movable rocking levers, means for rocking one of said levers, a sliding bolt for operatively securing the other lever to said first mentioned lever, a spring for protracting said bolt to operatively connect said levers together, manually operable means movable into position to' be engaged by said. bolt to thereby retract said bolt to its inoperative position, said last mentioned means positioned to be engaged by said bolt. as the lever carrying the same approaches the end of the stroke, and means for connecting said operated lever with said metal working member.

38. In a device such as described, a movable metal working member, and means to operate same comprising a pair of independently movable rocking levers, a sliding bolt carried by one of said levers, a spring for protracting said bolt into operative engagement with the other lever to connect said levers together, means positioned to be engaged by said bolt to retract the bolt as the lever carrying the same approaches the end of its" stroke, manually operable means for holding said last mentioned means in an inoperative position, andmeans for connecting said metal working member with the first mentioned lever.

39.-' A' power hammer carryi able relatively thereto. v v

40. A swinging power hammer, and a die pivoted to said hammer for movement relatively thereto. 7 I

41. Aswinging hammer, a die pivoted to said hammer, and means for yieldingly re-' taining said die in a" normal position. 42. In combination with" an anvil, two hammers mountedto deliver blows upon the same faceofthe work on the anvil, a source of power 'for operating said hammers, and means for selectively connecting either of said'hammers to said'sourceof power.

43. In combination with an anvil, two hammers mounted tofdeliver blows upon the same face ofthe work on the anvil, a source of power for operating said hammers, means -for selectively connecting either of said hammers to said source of power, and means for preventing the simultaneous operation of said hammers. j

"44. Ina metal working'machin'e, 'a source of power, two swinging hammers, means to independently connect either of said ng a die movhammers to said source of power and means acting in cooperation with said connectingmeans to increase the effective blows of said hammer.

45. A metalworking machine consisting of a source of power, a rocking lever operated by said power, a swinging hammer, a rocking lever connected to said hammer, means to connect the second mentioned rocking lever to the first mentioned rocking the hammer'and lever to give power to means to vary the effective blow of said hammer.

46. In a metal Working machine, a power driven rocking lever, two hammers, two

rocking levers connected to said hammers respectively and means to selectively connect either of said hammer connected levers to the power driven lever.

47. In combination with a work support,two hammers mounted to deliver blows upon the same face of the work on said support, a source of power for operating said hammers, means for selectively connectin either of said hammers to the source 0 power, means for preventing the simultaneous operation of said hammers and means to vary the efi'ective force of said power the two last mentioned means operated by the first mentioned means.

48. In combination with a work support, two hammers mounted to deliver blows upon work on said support, a source of power for operating said hammers, means for independently connecting either of said lfiainmers to; the-sourceof power; means to p r-ventrthe ot herjhammer fromjbeing so connected whe'nione is :eonnect'ed, means in cooperation with ithe ,-connecti n'gmeans to vary the effective :blow {of said hammenend means opem ting;upon the work independent of, said hammers to cause different faces of said-Work-to be presented to the hat-m ners. A 'metel workingflmachine co'mpri-sing, a frame, a rock shaft mountedfinfsaid frame a power d i-ven rocking lever mount eel upon saicl rockshnitfja pair of swinging hammers, n pnir. of rockinglevers con nectectto saint hammersgand lmounted upon sa-id rock sha ft means tocennect an clpl s'sconnect the hammer, rocking levers with the powe oh filven rocking lever selectively,-

means to ,,p 1 tevent both :haminer mocking leversv from 'b'eings0 connected simultaneously; a work sl ppor t -ineens .for E turning work upon, saidfs upipqlt to present the dif fefentffaces "ofo seid 'fwol'k to, ,the hammers end'fmeens tofvei'zy; the; force" of the blows of said hammrsiv .I

50. inetal workingfl mechine,n work support, @1 sionice offpowe ia member adapted to v be continuously operated f byrconnec; 101 W th v5 .2m of power, ,twd s ngin lhern ne 'fsiniou'nted "to, deliver blows upon the samefface of the Work upon' -saiduwo'rli support and meansfto selectively connect the hammerstosaid member; 4

-51. c0mbination with an anvi1,--two' hammers mounted to deliver blows: lipon work on the anvil,- asource.of,;powex for operating said hammers, separate means for selectively connecting either ofus'a-iol hammers to said source of power, and-,-means acted-upon byone of the -connecti-ngymean's t0- .prevent the operation of the other con:

necting means whereby one haminer cannot -be, operated while the other. 1s 1n'op'- 52.1 11 emetal orkinginach ihe, it source of .:power, two swinging, hammers, two: 0pemting levers for connecting said hammers to said sourcefof; power selectively, and

meens openetedby one ofsaid levers to prevent. the opemtion of the othef lever. d j

.. ,5 3. I n a 'wveld mg machine, an anvil,=-,a

pair of swinging hammer-sf mo mted to co- 7 o operate withihe upper fit'ce' of. said anvil,

andme'ans to selectively: operate either of said hammers.v v 1 r y In witness Whe eof I have hereiinto set y hand onthe 16th day'of J ine,.l9l'9. I I

I m n; 

